I have had problems over the last ten days booting my PC . After signing in either I am unable to activate the start and search buttons or my PC shows problems with my internet security, firewall and anti virus Programmes. Rebooting makes no significant difference. Checking my task and processes shows the following message "Microsoft\Windows\Plug and Play\ Device Install Reboot Required". If I terminate this task I can then boot normally into Windows 10 with full use of the start and search buttons. However the message keeps reappearing on initial boot and I cannot track down the source. Device Manager shows no problems and I just cannot get rid of or delete the Reboot message. I have tried the Windows troubleshooters which seemingly effect a cure but only until the next reboot. Any advice on eliminating the problem which is a perfect pain would be much appreciated.